TEST AND TAGGING

It is important to upkeep your test and tagging to ensure the safety of people in your workplace or home and minimise the risk of an electrical shock.

We test with our Metrel Delta Portable Appliance Tester and work in accordance with the current Australian standard AS/NZS 3760:2003

Australian Standard test checks;

  • Insulation resistance: Determines how effective the dielectric (insulation) is in resisting the flow of electrical current. A high level of resistance means that very little current is escaping through the insulation. A low level of resistance indicates a significant amount of current may be leaking through and along the insulation. Testing for this ensures the safety of appliances and protects users for any live parts.

  • Leakage Current Testing: The leakage current test takes place during the use of an electrical product. This is done by connecting the electrical device to the operating voltage and tested to see whether too high a leakage current flows through the insulation to the housing

  • Polarity: Incorrect polarity connections on consumer mains or sub-mains supplying an outbuilding with a seperate multiple earth neutral, will result in an energised earthing system. Testing this will ensure any incorrect connection is identified and rectified to prevent the risk of an electric shock.

  • Earth Resistance: The purpose of this test is to detect and locate high resistance joints, which are a typical result of corrosion in exposed conductor systems. The acceptable Earth Resistance at earth MEEB busbar should not be more than 1ohm. One method of testing this is to conduct an earth continuity test. We conduct this testing using our Metrel Delta system or insulation resistance tester; however please note that it doesn't take into account any damage to the earth connection or conductor and could be considered less effective than other methods of measuring earth resistance.

  • Visual Testing: A visual electrical inspection is a survey of your electrical wiring system. It is used to identify defects, damage or deterioration of the electrical installation and to determine whether it complies with the current BS7671 electrical safety standard.

    Visual Inspection Checklist:

    • Check for obvious external damage.

    • Check defects- accessories, plugs or socket outlets.

    • Check defects on connectors.

    • Check supply cords.